Open to opportunities

Prejita MathalaiRajan

@prejitamathalairajan

Message

Senior full-stack engineer building scalable React/.NET apps with Azure/AWS and an AI-first mindset.

India

Message

What I'm looking for

I’m seeking a senior remote engineering role where I can apply my full-stack depth in React/.NET and cloud-native development, while bringing an AI-first mindset—building real AI-integrated products with LLM tooling.

I’m a Senior Full Stack Engineer with 5+ years of experience building scalable, high-performance web applications in fintech. I bring deep strengths in React and .NET Core, plus cloud-native development across Azure and AWS.

In my recent role at NAF Tech, I improved customer-facing performance by reducing mortgage platform page load times by 30% for 10,000+ users. I also led a major Azure Cosmos DB cost-optimization effort—redesigning the data model and shrinking document sizes from 1MB to 50KB to cut costs by 95% and increase write throughput roughly 20x.

I enjoy turning systems into developer leverage: I helped design and build an internal API platform (replacing Postman) and integrated it with Azure API Management to support multiple environments. I’m now actively building AI-augmented applications using the Claude API and LLM tooling, and I’m pursuing AI engineering certifications to strengthen my ability to ship with an AI-first mindset.

Experience

Work history, roles, and key accomplishments

Senior Software Developer

NAF Tech India

Mar 2023 - Apr 2026 (3 years 1 month)

Built NafHub, a customer-facing mortgage platform in React and .NET Core, improving page load times by 30% for 10,000+ users. Redesigned Azure Cosmos DB data models to reduce document sizes from 1MB to 50KB, cutting write costs by 95% and increasing write throughput ~20x for high-volume operations.

React TypeScript .NET Core Azure Cosmos Azure Functions Microservices SQL CI CD Performance Optimization

Application Developer

Thoughtworks

Apr 2022 - Jan 2023 (9 months)

Contributed to GuruShifu, an internal training tool providing developers personalized code feedback, and built full-stack features with React and Spring Boot. Implemented AWS serverless-based execution and applied Agile/XP practices including TDD, pair programming, and continuous integration.